Trigger mechanism



Sept- 7, 1948. L. BRowNxNG TRIGGER MECHANISM Original Filed April 14,1944 a7 if Patented Sept. 7, 1948 UNITED STATES PATENT OFFICE TRIGGERMECHANISM Leander Browning, Greenwood, Ind.

3 Claims.

This application is a division of my copending application Serial Number530,975, filed April 14, 1944, upon which Patent Number 2,391,676 issuedon December 25, 1945.

The object of my invention is to provide an improved trigger mechanismby means of which a pressure-affected element may be held, released, andguided.

The accompanying drawings illustrate an embodiment of my invention in apruning tool, but it will be readily understood that the novel mechanism may be useful in other embodiments.

Fig. 1 is an elevation of a pruning tool in which the improved triggermechanism is incorporated;

Fig. 2 is a fragmentary axial section of the trigger mechanism andassociate parts; and

Fig. 3 is a section on line 3-3 of Fig. 2.

In the drawings, I indicates a tubular main body in which is mounted arod I2 biased in one direction by one or more springs I5 and providedwith a piston I4 and packing I4 fitting within body I0.

Rod I2, intermediate its length, is diametrically slotted at 20 (Fig. 2)to receive the latch 2| pivoted at 22. Latch 2| is medially slotted atits free end to form a latch nger 23 and a stop finger 24. The width oflatch 2l exceeds the Idiameter of rod I2 so that it projects radially atopposite sides of rod I2 and extends into keyways 25, 26 formed in theguide ring 2 mounted within barrel I0. Pivoted at 28, in keyway 25, isthe trigger 29 having an abutment shoulder 33 for reception of the tipof latch iinger 23, and a nger 3| overlying said finger 23. Rod I2within the area between fingers 23 and 24, is transversely bored to forma pocket 32 within which is seated a spring 33 engaging finger 23 andnormally biasing the latch 2I to the position shown in Fig. 2.

Trigger 29 is biased to the position shown in Fig. 2 by spring 34 and,in order to ease operation of the trigger, I provide a linger lever 35pivoted at 36 on yoke 31 secured to barrel III and connected to thetrigger by link 38.

Latch 2I sliding in the keyways 25 and 26 prevents rotation of plungerrod I2 during its reciprocation, and when the parts are in normal, atrest, position (Fig. 2), the tip of finger 23 engages shoulder 30substantially in line with pivot 28. When finger lever 35 is pulled inthe direction indicated by the arrow (Fig. 2) the free end of the latch2I is swung to the left to clear the latch from obstruction by thetrigger.

The lower end of barrel III is closed by the axially bored plug 4I]provided with sealing cup 4I which provides an air-tight associationwith barrel I I).

Rod I2 may be moved against the bias of springs I5 by any suitablemeans, as by air pressure applied to piston I4-I4.

I claim as my invention:

1. Trigger means, comprising a main body, a reciprocable member carriedby the main body, a pivoted latch carried by said reciprocable memberand biased laterally thereof, and a trigger comprising a plate pivotedon an axis transverse of the line of movement of the reciprocablemember, said plate having an abutment surface engageable by the latch torestrain movement of said reciprocable member in one direction and afinger engaging said latch to swing its free end away from said abutmentsurface to eliminate said restraint, one edge of said plate projectinglaterally beyond the reciprocable member with said edge slidable in aguide groove extending lengthwise of the line of movement of thereciprocable member.

2. Trigger means, comprising a main body, a reciprocable member carriedby the main body, a pivoted latch carried by said reciprocable member,spring means biasing said latch radially outwardly relative to saidmember, and a trigger pivoted on Van axis transverse of the line ofmovement of the reciprocable member, said trigger having an abutmentsurface engageable by the latch to restrain movement of saidreciprocable member in one direction and having a nger engaging saidlatch to swing its free end away from said abutment surface to eliminatesaid restraint.

3. Trigger means, comprising a main body, a reciprocable member carriedby the main body, a, pivoted latch carried by said reciprocable memberand biased laterally thereof, and a trigger pivoted on an axistransverse of the line of movement of the reciprocable member, saidtrigger having an abutment surface engageable by the latch to restrainmovement of said reciprocable member in one direction and said triggerhaving a finger angularly related to said abutment surface and movabletherewith, said finger being engageable with said latch, upon movementof said trigger in one direction, to shift said latch against its biaspositively out of engagement with said abutment surface.

LEANDER BROWNING.

REFERENCES CITED UNITED STATES PATENTS Number Name Date Barthel Oct. 21,1879

